Sachusetts



BROWN & BANKER Pai nt Mill.

Patented May 15, 1860.

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UNITED STATES PATENT OFFICE.

CHARLES W. BROXVN AND GEORGE W". BANKER, OF BOSTON, MASSACHUSETTS, ASSIGNORS TO GEO. W. BANKER, OF BOSTON, AND GEO. O. CARPENTER, OF SOUTH READING, MAS- SACHUSETTS.

MACHINE FOR MIXING PAINTS.

Specification of Letters Patent No. 28,324, dated May 15, 1860.

To all whom it may concern.

. Be itknown that we, CHARLES \V. BROWN and GEORGE V. BANKER, of Boston, in the county of Sufiolk and State of Massachusetts, have invented a new and Improved Paint-Mixing Machine; and we do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, forming a part of this specification, in which- Figure 1, represents a vertical cross section taken through the machine, showing clearly the interior of the paint box. Fig. 2, is a horizontal section taken through the box of the machine as indicated by the red line m, as, of Fig. 2.

Similar letters of reference indicate corresponding parts in both figures.

The nature of this invention consists in a novel arrangement of fixed knives, or blades, in the bottom of a tub, with revolving knives or knife edged arms, fixed to a rotary arm driven by suitable machinery, whereby the paint will be thrown toward the circumference of the tub, and receive a thorough mixing action from the arms, and at the same time the movable and fixed arms will be arranged in such a relation to each other that the arms will pass each other in pairs, at equal distances from the center of the shaft, and diametrically opposite each other, and not pass between any two pairs in the tub at the same instant, and under the same circumstances.

The object of this invention is to give to the semi-liquid contents of the tub a thorough mixing by the action of fixed and revolving arms, at the same time to equalize the operation of the revolving arms by preventing more than two of them from passing each other at the same moment, as will be hereinafter described and represented.

To enable those skilled in the art to fully understand our invention, we will proceed to describe its construction and operation.

In the drawings, A represents a cylindrical tub of a suitable depth with a central tube A, proceeding up to nearly a level with the top of the same and formed with the tub. This tub rests in two upright posts B, B, that serve as a frame for supporting also the gearing for giving a rotary motion to a perpendicular central shaft or spindle C, to which is attached the horizontal arms D, D, that carry the stirring arms a, a. The spindle C, passes down through the tube and is stepped in a bearing E, while on its upper end is placed and properly keyed a bevel spur wheel I), that engages with the teeth of a pinion wheel 0, on shaft F, which shaft has a belt wheel on one end that transmits motion to the spindle from any convenient prime mover.

The bottom of the tube A, is furnished with stationary arms (Z, d, that are arranged in scrolls converging from the central tube A, to the circumference of the tub. These arms (Z, are arranged parallel with the revolving stirring arms a, a, and in such a relation to these arms that no two of them will pass between any two pairs projecting from the tubs bottom, and so that the arms will pass each other in pairs, diametrically opposite each other, and at nearly equal distances from the axis of the spindle, as represented in the drawings, Figs. 1 and 2.

The arms or knives both movable and stationary, are tapered from their bases to their tops, and they have also both their edges beveled in the manner shown in Fig. 2, so that they will readily pass each other in their revolution around thecentral tube.

J, is a gate used for drawing olf the paint when properly mixed, from the bottom of the tub.

Having thus described our invention, what we claim and desire to secure by Letters Patent, is,

The method of constructing and arranging the mixing apparatus, in such a way that the fixed arms in the tub shall be set so as to describe scrolls from the central tube, or center of the tub, and arranged in such a relation to the parallel revolving arms that they will pass each other only in pairs at nearly equal distances from the axis of the spindle in the manner described and represented, for the purpose set forth.

CHARLES V. BROVN. GEORGE V. BANKER.

lVitnesses:

M. A. BLAISDELL, J. D. MORTON. 

